C# 将实体列表转换为整数数组

我需要用int类型的60个值填充一个数组，并且在数据库的DbSet中有这些值

在不进行循环的情况下，是否有办法将此列表转换为Int[]。 该值位于名为“温度”的属性中

public void SetLineChartData()
{
    //Suppose we have a list of 60 items.
    using (ZigBeeContext db = new ZigBeeContext())
    {
        var lista = (from p in db.Medidas
        select new Medida
        {
            Fecha = p.FechaHora
        }).ToList();
    }

    lineChartData = new int[60];
    lineChartData[0] = RandomNumberGenerator.randomScalingFactor();
    hora[0] = DateTime.Now.ToShortTimeString();

    lineChartData[1] = RandomNumberGenerator.randomScalingFactor();
    hora[1] = DateTime.Now.ToShortTimeString();

    lineChartData[2] = RandomNumberGenerator.randomScalingFactor();
    hora[2] = DateTime.Now.ToShortTimeString();

    lineChartData[3] = RandomNumberGenerator.randomScalingFactor();
    hora[3] = DateTime.Now.ToShortTimeString();

    lineChartData[4] = RandomNumberGenerator.randomScalingFactor();
    hora[4] = DateTime.Now.ToShortTimeString();

    lineChartData[5] = RandomNumberGenerator.randomScalingFactor();
    hora[5] = DateTime.Now.ToShortTimeString();

    lineChartData[6] = RandomNumberGenerator.randomScalingFactor();
    hora[6] = DateTime.Now.ToShortTimeString();

    //colorString = "rgba(" + RandomNumberGenerator.randomColorFactor() + "," + RandomNumberGenerator.randomColorFactor() + "," + RandomNumberGenerator.randomColorFactor() + ",.3)";
}

我需要用int类型的60个值填充一个数组，并且在数据库的DbSet中有这些值

在不进行循环的情况下，是否有办法将此列表转换为Int[]。该值位于名为temperature的属性中，不确定“不进行循环”是什么意思，因为许多函数将执行循环，即使它们看起来不像循环。

public void SetLineChartData()
{
    //Suppose we have a list of 60 items.
    using (ZigBeeContext db = new ZigBeeContext())
    {
        var lista = (from p in db.Medidas
        select new Medida
        {
            Fecha = p.FechaHora
        }).ToList();
    }

    lineChartData = new int[60];
    lineChartData[0] = RandomNumberGenerator.randomScalingFactor();
    hora[0] = DateTime.Now.ToShortTimeString();

    lineChartData[1] = RandomNumberGenerator.randomScalingFactor();
    hora[1] = DateTime.Now.ToShortTimeString();

    lineChartData[2] = RandomNumberGenerator.randomScalingFactor();
    hora[2] = DateTime.Now.ToShortTimeString();

    lineChartData[3] = RandomNumberGenerator.randomScalingFactor();
    hora[3] = DateTime.Now.ToShortTimeString();

    lineChartData[4] = RandomNumberGenerator.randomScalingFactor();
    hora[4] = DateTime.Now.ToShortTimeString();

    lineChartData[5] = RandomNumberGenerator.randomScalingFactor();
    hora[5] = DateTime.Now.ToShortTimeString();

    lineChartData[6] = RandomNumberGenerator.randomScalingFactor();
    hora[6] = DateTime.Now.ToShortTimeString();

    //colorString = "rgba(" + RandomNumberGenerator.randomColorFactor() + "," + RandomNumberGenerator.randomColorFactor() + "," + RandomNumberGenerator.randomColorFactor() + ",.3)";
}

如果我明白你想做什么，那么可能是这样的：

int[] myArray = lista.Select(x => x.temperature).ToArray();

---

LINQ可以提供您所要求的：

var arr = lista.Select(i => i.Fecha).ToArray();

---

使用Linq，您可以这样做：

List<MyObject> lst = new List<MyObject>(); // fake dbSet can be Queryable

int[] toto =   lst.Take(60).Select(item => item.MyInt).ToArray();


private class MyObject
{
    public int MyInt { get; set; }
}

List lst=new List（）；//伪造的数据库集是可以查询的
int[]toto=lst.Take（60）.Select（item=>item.MyInt.ToArray（）；
私有类MyObject
{
公共int MyInt{get；set；}
}

只需使用Linq：

public void SetLineChartData()
{
    int[] yourIntArray; // your int array
    //Suppose we have a list of 60 items.
    using (ZigBeeContext db = new ZigBeeContext())
    {
        var lista = (from p in db.Medidas
                        select new Medida
                        {
                            Fecha = p.FechaHora,
                        }).ToList();
        // here is how you can do that
        yourIntArray = lista.Select(x => 
                        x.FechaHora //i think that's property that you need to be in int array
                        ).ToArray();
    }
}

---

如果FechaHora已经不是int，而你想施放它，你可以这样做

int[] lista = db.Medidas.Select(p => p.FechaHora).Cast<int>().ToArray();

int[]lista=db.Medidas.Select（p=>p.FechaHora.Cast（）.ToArray（）；

使用Linq您可以这样做。是否要从此

db.Medidas

绑定您的

int

列表？